﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo09
{
    class Disk : Reserve, USB
    {
        public Disk(string band, string type) : base(band, type) { 
        
        }
        public void Usb()
        {
            Console.WriteLine("正在读取中！！！");
        }
    }
}
